Freud glue-line rip blades

KYwoodwrkr | Posted in Power Tools and Machinery on July 4, 2020 04:07pm

For anyone using this blade (LM74R010) to cut grooves (or dados), does it cut a flat bottom groove or are the inside corners of the groove chamfered? It has both flat ground and triple chip ground teeth, so I can’t tell what the resulting cut would look like.

Replies

mdorsam | Jul 04, 2020 10:22pm | #1
The Triple Chip design should leave a flat bottom; however, it won't be. First, it's a 30-tooth blade, which is a good count for ripping - it's designed to cut fast through long-grain - it doesn't necessarily follow that the cut is consistently flat or smooth across the dado. Secondly, to get a dado-type width, you will need several passes, which invariably means different pressure and depth of cut on the wood as it passes over the blade. Given that high-quality stacked dado sets cost a small fortune - and often leave variable results, this approach is:
1) an excellent alternative requiring only a minor amount of additional time (extra passes across the saw (I recommend cutting the two shoulders first, then hogging-out the middle);
2) should get close; follow-up with a few passes in the cut with a appropriately wide chisel.
user-6447395 | Jul 05, 2020 09:39am | #2
Freud also makes a 24 tooth rip blade described as -- Freud - LM72R010 Ripping Saw Blade 10" x 5/8" Bore x 24 Tooth Flat Top. It is really going to make a flat top. I have the 30 tooth blade and it does not make a flat top.
user-7211029 | Jul 05, 2020 10:35am | #3
Chamfered or "U" shaped.
Jkatzowitz | Jul 05, 2020 03:57pm | #4
I recently purchased the Freud 24 tooth rip blade and it leaves a flat bottom cut. Great for ripping and dados.